Look at the following sites to find out information about the eye.
http://www.macula.org/anatomy/index.html Eye anatomy
http://www.kidshealth.org/kid/body/eye_SW.html Eye anatomy
http://faculty.washington.edu/chudler/words.html Colors, colors experiment
http://faculty.washington.edu/chudler/flash/nill.html Optical illusions
http://www.exploratorium.edu/learning_studio/cow_eye/index.html Cow eye dissection